Exploring the Magnetic Properties of Individual Barcode Nanowires using Wide-Field Diamond Microscopy

Jungbae Yoon, Jun Hwan Moon, Jugyeong Chung, Yu Jin Kim, Kihwan Kim, Hee Seong Kang, Yoo Sang Jeon, Eunsoo Oh, Sun Hwa Lee, Kihoon Han, Dongmin Lee, Chul Ho Lee, Young Keun Kim, Donghun Lee

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


A barcode magnetic nanowire typically comprises a multilayer magnetic structure in a single body with more than one segment type. Interestingly, due to selective functionalization and novel interactions between the layers, it has attracted significant attention, particularly in bioengineering. However, analyzing the magnetic properties at the individual nanowire level remains challenging. Herein, the characterization of a single magnetic nanowire is investigated at room temperature under ambient conditions based on magnetic images obtained via wide-field quantum microscopy with nitrogen-vacancy centers in diamond. Consequently, critical magnetic properties of a single nanowire can be extracted, such as saturation magnetization and coercivity, by comparing the experimental result with that of micromagnetic simulation. This study opens up the possibility for a versatile in situ characterization method suited to individual magnetic nanowires.

Original languageEnglish
Article number2304129
Issue number40
Publication statusPublished - 2023 Oct 4

Bibliographical note

Funding Information:
The authors acknowledge financial support from the National Research Foundation of Korea (2018M3C7A1024602, 2019R1A2C3006587, and 2021R1F1A1049355). The research related to the heat treatment of single‐crystal diamonds was supported by the Institute for Basic Science (IBS‐R019‐D1).

Publisher Copyright:
© 2023 Wiley-VCH GmbH.


  • barcode magnetic nanowires
  • diamond nitrogen-vacancy center
  • wide-field quantum microscopy

ASJC Scopus subject areas

  • Biotechnology
  • General Chemistry
  • Biomaterials
  • General Materials Science
  • Engineering (miscellaneous)


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